Public debt and functional finance in an OLG model with imperfect competition

This paper examines the role of fiscal policy in the long run. We show that (i) dynamic inefficiency may be empirically relevant in a modified Diamond OLG model with imperfect competition, (ii) fiscal policy may be needed to avoid inefficiency (if investment adjusts passively to saving) and maintain full employment (if investment and saving decisions are taken separately), (iii) a simple and distributionally neutral tax scheme can maintain full employment in the face of variations in 'household confidence', and (iv) the debt ratio is inversely related to both the growth rate and government consumption. -- Public debt ; Keynesian OLG model ; dynamic efficiency ; confidence ; sustainability